Cascade-based method and device for fluid handling and measureme

Details Cascade-based method and device for fluid handling and measureme Cascade-based method and device for fluid handling and measureme

1981-10-30

1984-02-07

Tapoicai, William E.

Fluid handling

Larner-johnson type valves; i.e., telescoping internal valve...

Line condition change responsive

137221, 137489, F16K 2400

Patent

active

044297092

ABSTRACT:
A method and devices for applying the generally known principle of cascade flow in control of self-adjusting fluid handling systems, which devices are capable of maintaining predetermined flow rate/pressure difference ratios, over a wide range of variations.
The capability of maintaining predetermined flow rate/pressure difference ratios is based on a capability of maintaining predetermined displacement/pressure difference ratios of axially displaceable means of control in application of the principle of cascade flow.
One embodiment is a draught control device, which is capable of maintaining substantially constant draught, e.g., in central heating boilers of solid fuel, over a wide range of variations in flue pressure.
Another embodiment is a constant flow valve, capable of maintaining constant rate of volume flows in house ventilation.
A third embodiment of the present invention is a constant pressure valve, capable of maintaining constant pressure of fluid upstream the valve.

REFERENCES:
patent: Re18849 (1933-05-01), McClellan et al.
patent: 1629957 (1927-05-01), Larner
patent: 1723359 (1929-08-01), Larner
patent: 1998459 (1935-04-01), Kinzie
patent: 2052572 (1936-09-01), Kerr
patent: 3275022 (1966-09-01), Kobayashi et al.
patent: 3515165 (1970-06-01), Zadoo
patent: 3972448 (1976-08-01), Brown

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